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通过填充纳米碳酸钙(CaCO3)或与聚丙烯(共聚PP)共混两种方法对旋转模塑聚乙烯(PE)专用树脂进行增强改性,通过测试改性体系的密度、拉伸强度、弯曲强度、冲击强度、硬度、熔体指数等性能指标,并借助扫描电镜(SEM)及转矩流变仪等分析手段系统地研究改性体系的性能与其各组分含量之间的关系。结果表明:两种方法改性的聚乙烯树脂力学强度均明显增加,且改性体系密度、熔体黏度仍适用于旋转模塑工艺,采用上述两种方法对现行旋转模塑PE树脂进行增强改性是可行的。
The rotational molding polyethylene (PE) resin was modified by two methods, namely filling calcium carbonate (CaCO3) or blending with polypropylene (copolymer PP). The modified system was tested for density, tensile strength, Strength, impact strength, hardness, melt index and other performance indicators, and the use of scanning electron microscopy (SEM) and torque rheometer and other analytical tools to systematically study the relationship between the performance of the modified system and its components. The results show that the mechanical strength of polyethylene resin modified by the two methods are obviously increased, and the density of the modified system and the viscosity of the melt are still suitable for the rotational molding process. The two kinds of methods are used to enhance the mechanical properties of the current rotational molding PE resin Sex is feasible.